 .popup-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.6);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.3s ease, visibility 0.3s;
}

.popup-overlay.show {
  visibility: visible;
  opacity: 1;
}

.popup-content {
  background: white;
  padding: 30px;
  border-radius: 8px;
  max-width: 400px;
  text-align: center;
  position: relative;
  box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.close-btn {
  position: absolute;
  top: 10px;
  right: 15px;
  font-size: 22px;
  cursor: pointer;
  color: #666;
}